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Effects of Molarity and Storage Time of MWCNTs on the Properties of Cement Paste.

Authors :
Laura, Echeverry-Cardona
Rafael, Cabanzo
Jorge, Quintero-Orozco
Harvi Alirio, Castillo-Cuero
Laura Victoria, Rodríguez-Restrepo
Elisabeth, Restrepo-Parra
Source :
Materials (1996-1944). Dec2022, Vol. 15 Issue 24, p9035. 17p.
Publication Year :
2022

Abstract

Nowadays, nanomaterials in cement pastes are among the most important topics in the cement industry because they can be used for several applications. For this reason, this work presents a study about the influence of changing the molarity of dispersed multiple wall carbon nanotubes (MWCNTs) and varying the number of storage days on the mechanical properties of the cement paste. To achieve this objective, dispersions of 0.35% MWCNTs, varying the molarity of the surfactant as 10 mM, 20 mM, 40 mM, 60 mM, 80 mM, and 100 mM, were performed. The mixture of materials was developed using the sonication process; furthermore, materials were analyzed using UV-Vis, Z-potential, and Raman spectroscopy techniques. Materials with a molarity of 10 mM exhibited the best results, allowing them to also be stored for four weeks. Regarding the mechanical properties, an increase in the elastic modulus was observed when MWCNTs were included in the cement paste for all storage times. The elastic modulus and the maximum stress increased as the storage time increased. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961944
Volume :
15
Issue :
24
Database :
Academic Search Index
Journal :
Materials (1996-1944)
Publication Type :
Academic Journal
Accession number :
161008924
Full Text :
https://doi.org/10.3390/ma15249035